Abstract: Electronic data for presenting images to teach radiology diagnosis are stored on a computer readable storage medium. The stored data includes an image table that includes indexed radiology images to be displayed; a frame table that includes frame entries, each for displaying a frame in a sequence of frames to be displayed and comprising a time indicator indicating a time to display the frame in the sequence, and display state data indicating a display state of one of the radiology images to be displayed in the frame; at least one annotation table including data defining teaching annotations to be superimposed on at least one radiology image. Each frame entry is associated with a radiology image and each annotation table is associated with a frame entry. An encoder/decoder is provided for encoding and storing the data in a file and for decoding and presenting images formed from the data.